| Value | Category |
|---|---|
| 0 | No other source |
| 1 | Other job |
| 2 | Business, own land |
| 3 | Help from family |
| 4 | Family abroad |
| 5 | Rent of property |
| 6 | Interest |
| 7 | Dividends |
| 8 | Pensions |
| 9 | Alimony, divorce payments |
| 10 | Extra hours of work |
| 11 | Tips |
| 12 | Scolarships |
| 13 | School help |
| 96 | Other |